ADAPTER-CIGARETTE LIGHTER AND POWER PLUG-FOR BATTERY CHARGER-ALL YEARS (#E13911)

Conveniently charge/maintain your vehicle's battery through the cigarette lighter or power plug port. Fuse protected with 12" cord. Connects to the new & improved Battery Butler Storage Charger, equipped with accessory disconnect plug. This adapter should only be used in a cigarette lighter port or power plug port that is NOT energized by the ignition switch. How can you tell if the port is energized by the ignition switch? With the ignition switch in the OFF position (the key out), plug a device like a cell phone charger or radar detector into the port. If the device has power, you can use that port, and this adapter, to charge and maintain your battery.